What happened to my radar?

[Azurem]

I got the message that it was damaged, and then that it was destroyed. When I went to investigate there was a spooky transparent radar ghost with a purple health bar that doesn't scan. It's right in the middle of my smelting and I don't think enemies could have got there, and if they did then they would have damaged other stuff as well. I destroyed the ghost and built a new radar in the same spot, and the same thing happened again.

http://steamcommunity.com/id/mizzle25/screenshot/313370413675993938

What's going on and how do I stop it?

[Chrome]

I think radars are near the top of the list as a tasty alien treat, so if it's located within your "main pollution" so to say, the want a bite.

Also recall reading that some people aren't having as many issues if the the radar is in a more remote location outside the pollution cloud so you could try doing that. Few solar panels & accumulators with walls and a turret perhaps.

[AlexMBrennan]

What's going on

You have construction robots. The destroyed building was automatically tagged for rebuilding by robots (like a manully placed blueprint), but you don't have any radars in logistics storage, or don't have any construction robots in range. https://www.factorio.com/blog/post/fff-10

how do I stop it?

I guess you could not research construction robots

[Azurem]

Originally posted by Chrome:

I think radars are near the top of the list as a tasty alien treat, so if it's located within your "main pollution" so to say, the want a bite.

Also recall reading that some people aren't having as many issues if the the radar is in a more remote location outside the pollution cloud so you could try doing that. Few solar panels & accumulators with walls and a turret perhaps.

When I got there were no aliens or alien corpses around. How would they get past all my defenses to the middle of my base? And once they got there, and they're in the middle of a load of pollution-producing stuff with no turrets nearby to stop them, why would they just leave again after destroying the radar without even damaging a single other structure? It doesn't match any attack I've seen from them - they generally just run at me in a massive group and wreck anything they see. Are there sneaky saboteur biters?
Maybe there are, it hasn't happened again since I moved the radar to the edge of my base near the turrets...

Originally posted by AlexMBrennan:

What's going on

You have construction robots. The destroyed building was automatically tagged for rebuilding by robots (like a manully placed blueprint), but you don't have any radars in logistics storage, or don't have any construction robots in range. https://www.factorio.com/blog/post/fff-10

how do I stop it?

I guess you could not research construction robots

Well that explains what the ghost is at least, thanks. I did research the technology but I've been doing other stuff and still haven't got around to setting up a factory to actually build robots.
With the "how do I stop it" I was more refering to it getting destroyed in the first place :P

[Skev]

Aliens will home in on radars like they're made of bacon amd they insulted the aliens' mother. They frickin' love attacking radars, probably came in from a weird direction that you weren't expecting, destroyed the radar and then ran off to attack something else, found a turret and died. If you ever place a radar that isn't completely walled in, it really should have at least one turret with it.